<mat-icon style="font-size: medium; cursor: pointer"
          *ngIf="diffOn || difference"
          (click)="clickDiff()"
          [matTooltip]="diffOn ? 'Click to see changed value' : 'Click to see original value'">
    <ng-container *ngIf="diffOn">update</ng-container>
    <ng-container *ngIf="!diffOn">restore</ng-container>
</mat-icon>

